acceleration/speed question

The driver of a car slams on the brakes when he sees a tree blocking the road. The car slows uniformly with an acceleration of -5.60 m/s^2
for 4.20 s, making straight skid marks 62.4 m long ending at the tree. With what speed does the car then strike the tree?

The driver of a car slams on the brakes when he sees a tree blocking the road. The car slows uniformly with an acceleration of -5.60 m/s^2
for 4.20 s, making straight skid marks 62.4 m long ending at the tree. With what speed does the car then strike the tree?